Remove duplicate vpc_id variable; set default to false for new enable…

…_EC2_IAM_Auth variable.

examples/vault-cluster-private/variables.tf

@@ -69,7 +69,3 @@ variable "vpc_id" {
   default     = ""
 }
 
-variable "vpc_id" {
-    description = "The ID of the VPC in which the nodes will be deployed.  Uses default VPC if not supplied."
-    default = ""
-}

modules/vault-cluster/variables.tf

@@ -178,4 +178,5 @@ variable "force_destroy_s3_bucket" {
 
 variable "enable_EC2_IAM_Auth" {
   description = "Configure IAM Instance Profile on Vault cluster members to permit the user to enable AWS Auth backend. Note that this does NOT actually enable the backend, but merely sets policys that will permit it to function as expected."
+  default     = false
 }